Rear Panel Connections - Cambridge Audio azur 651W User Manual

Rear panel connections

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1. Power On/Off
Switches the unit on and off. If the 651W is not going to be used for long
periods of time it should be turned off using this switch.
2.
Mains Voltage Selector Switch (CU version only)
Switches the 651W mains voltage between 100V and 115V.
Note: For use by Cambridge Audio service personnel only!
3. AC power socket
Once you have completed all connections to the unit, plug the AC power
cable into an appropriate mains socket then switch on. Your unit is now
ready for use.
4. Loudspeaker terminals
Two sets of loudspeaker terminals are available, a main loudspeaker
terminals (top row) and secondary loudspeaker terminals (bottom
row). Connect the wires from your left channel loudspeaker to the LEFT
positive and negative terminals, and the wires from the right channel
loudspeaker to the RIGHT positive and negative terminals. In each case,
the red terminal is the positive output and the black terminal is the
negative output.
Care should be taken to ensure no stray strands of wire are shorting
speaker outputs together. Please ensure that the loudspeaker terminals
have been tightened adequately to provide a good electrical connection.
It is possible for the sound quality to be affected if the screw terminals
are loose.
5. Control Bus
In - Allows un-modulated commands from multi-room systems or other
components to be received by the unit.
Out - Loop out for Control Bus commands to another unit.
The 651W can also be switched between On and Standby mode by
connecting the Control Bus output of an 851E pre-amplifier to the
Control Bus input of the 651W. Refer to the 'Power syncing' section of
this manual for more information.
6. IR (Infra-Red) Emitter In
Allows modulated IR commands from multi-room systems or IR repeater
systems to be received by the unit. Commands received here are not
looped out of the Control Bus. Refer to the 'Custom installation' section
for more information.
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7. Trigger In, Out/Thru
For Custom Install use or with preamps and with trigger outputs, the
651W can be turned on and off (i.e. brought in and out of Standby
mode) by the presence of 5-12V DC at the Trigger input. A trigger input
will also produce an internally generated 12V DC trigger output at the
Output/Thru connection. Turning the 651W on from the front panel also
produces a 12V DC trigger output at the Output/Thru connection. This
can be used to turn on/Standby other connected power amplifiers or
other equipment if desired. Refer to the 'Power syncing' section of this
manual for more information.
8. Input Type switch
Use to select a balanced or unbalanced connection type for the input.
Input types
The 651W features either unbalanced (phono/RCA) or balanced (XLR)
input connections. Either type may be used but not both at the same
time. The balanced connection is the higher quality option and can reject
noise and interference in the cable when used with other equipment
that supports this function. An XLR connector is wired Pin 1 - Ground; Pin
2 - Hot (in-phase); Pin 3 - Cold (phase-inverted).
Use the Input Type switch to select the connection type you wish to use.
When using either the balanced or unbalanced input, make sure that
no cables or equipment are connected to the unused input, as this may
degrade operation. The unused input does not need to be terminated
and this should not be done.
Warning! DO NOT switch between input types when the 651W is on.
9. Balanced Audio Input
For connection to the balanced XLR outputs of suitable pre-amplifiers
that have this kind of output (such as our own 851E model). The pre-
amplifier used should be capable of providing at least 1V rms of output
per phase (i.e. at both of + and – terminals of the XLR, more is also fine).
Nearly all modern pre-amplifiers fulfill this requirement.
10. Unbalanced Audio Input
For connection to the normal (single ended) RCA/Phono outputs of a
suitable pre-amplifier (such as our own 851E model). The pre-amplifier
used should be capable of providing at least 1V rms of output (more is
fine). Nearly all modern pre-amplifiers fulfil this requirement.
azur
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651W
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